guix pack: display build output

.gitlab-ci.yml

@@ -6,7 +6,7 @@ stages:
 build-job:
   stage: build
   script:    
-    - cp $(guix pack -m manifest.scm -f tarball -S /bin=bin --relocatable --relocatable) walint.tar
+    - cp $(guix pack -m manifest.scm -f tarball -S /bin=bin --relocatable --relocatable --verbosity=4) walint.tar
   artifacts:
     paths:
       - walint.tar